You can say couldn't've — and it still makes sense. But nobody thinks you can say theredn't've. Why do some contractions in the English language work and not others. In this video, Tom Scott looks for answers.
Why doesn’t theredn’t’ve make sense?

You can say couldn't've — and it still makes sense. But nobody thinks you can say theredn't've. Why do some contractions in the English language work and not others. In this video, Tom Scott looks for answers.
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